-When _______ your mother _______ you that blue dress, Mary?-Sorry, I really can't remember.
#36452
A
does; buy
B
has; bought
C
had; bought
D
did; buy
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—Why didn’t you go to the movie yesterday? —Because I_________it before. 
#42506
A
had watched
B
have seen
C
have watched
D
had seen
 We only heard about the meeting yesterday, so it ______ yet.
#42760
A
didn’t prepare
B
hasn’t prepared
C
wasn’t prepared
D
hasn’t been prepared
Mr. Li isn’t here. He______Shanghai on business. He will be back next Monday.
#42055
A
went
B
has gone to
C
has been to
D
will go to